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Finding the Fourth Proportional to 261,028.70, 391,543.05 and 228,887.90

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Solution

The fourth proportional to 261,028.70, 391,543.05 and 228,887.90 is: 343,331.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    261,028.70 : 391,543.05 = 228,887.90 : x
  2. Step 2: Convert to fraction form
    261,028.70/391,543.05 = 228,887.90/x
  3. Step 3: Cross multiply
    261,028.70x = 391,543.05 × 228,887.90
  4. Step 4: Simplify right side
    261,028.70x = 89,619,466,474.10
  5. Step 5: Solve for x
    x = 89,619,466,474.10/261,028.70
  6. Step 6: Final answer
    x = 343,331.85

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.